Display rack



FIG. 1 is a perspective view of a display rack illustrating my new design;

FIG. 2 is a front elevation view thereof, the rear view being identical in appearance;

FIG. 3 is a right side elevation view thereof, the left side elevation view being identical in appearance;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a display rack, as shown and described. 